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Force sensing devices, especially weighing cells

A sensing device, sensor technology, used in measurement devices, weighing devices using electrostatic balance, weighing devices using elastically deformable parts, etc.

Inactive Publication Date: 2015-08-12
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since only very small deformations or movements and even smaller deformations and movements can be detected linearly due to their small size with sensors produced in micromechanical technology, there is the problem that it is necessary to provide sensors of different sizes and configurations. Choose a suitable MEMS sensor for the elastic body or find a suitable position from the perspective of the MEMS sensor, where it is mounted on the elastic body

Method used

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  • Force sensing devices, especially weighing cells
  • Force sensing devices, especially weighing cells
  • Force sensing devices, especially weighing cells

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0022] figure 1 A weighing cell is shown with an elastic body 1 in the form of a double curved beam made of metal, which is firmly mounted at the end 2 and which contains a recess 3 in the middle of the beam. Areas with a reduced material cross-section are provided on the upper and lower sides of the recess 3 , forming the four bending points 4 , 5 , 6 and 7 of the double bending beam. The remaining webs of material between the bending points 4 and 5 or 6 and 7 form an upper arm 8 and a lower arm 9 , which extend parallel to one another. Inside the recess 3, two rigid beams 11 and 12 extend from the two ends 2 and 10 of the elastic body 1 towards each other and end when a certain distance is reached between them. One of the two separate sensor parts 13 and 14 of the sensor 15 is arranged at the free end of each of the two rigid beams 11 and 12 . Here, one of the two sensor parts, here the sensor part 13 , is arranged at the end of the associated rigid beam 11 with the electr...

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PUM

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Abstract

The invention relates to a force sensing device, in particular a weighing unit, consisting of an elastic body (1) deformed under the action of a force or load (18) to be measured, and a sensor (15), the The sensor has two separate sensor parts (13, 14) mounted at different positions on the elastomer body (1) and generates a sensor signal that depends on the relative position of the sensor parts (13, 14) to each other. In order to improve the adaptation of the sensor (15) to the elastomer (1), one of the sensor parts (13, 14) is mounted on the elastomer (1) with the electromechanical actuator (16) in between and A control device is present, which controls the actuator (16) in a direction that reduces the positional difference of the sensor parts (13, 14) as a function of the sensor signal.

Description

technical field [0001] The invention relates to a force sensing device, in particular a weighing cell, comprising: an elastic body deformed under the force or load to be measured; and a sensor consisting of two separate and mounted The sensor parts at different positions on the elastic body form and generate sensor signals which depend on the relative position of the sensor parts to one another. Background technique [0002] Common force sensors and special load cells are measuring transducers which convert the forces or loads acting on them into electrical analog or digital measuring signals. In this case, the mostly metallic elastomer deforms elastically proportional to the applied load or force and the resulting deformation of the elastomer or of specific components thereof is detected with suitable sensors. Length changes at bent parts are usually detected by means of strain gauges. Alternatively, the distance change resulting from the deformation can also be detected ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01G7/06G01G3/14
CPCG01G3/12G01G3/1416G01L1/086
Inventor 迪尔克·沙伊布纳阿尔诺·斯特肯博恩
Owner SIEMENS AG